CONCORD, Mass., Nov. 30, 2006 – SolidWorks, a Dassault Systèmes S.A. (Nasdaq: DASTY, Euronext Paris: #13065, DSY.PA) company, today announced that SolidWorks® 2007 software is the first 3D CAD product available and certified by Microsoft Corp. for the new Windows Vista operating system, once again putting SolidWorks customers first in line to enjoy important new capabilities.

SolidWorks Edition for Windows Vista delivers an enhanced customer experience, empowering customers to work more effectively and design better products. It takes advantage of a wide range of Windows Vista features that optimize efficiency and visual interaction. Customers will also experience the benefits of Windows Vista through applications in the 2007 Office system that are integrated with SolidWorks software.

SolidWorks Edition for Windows Vista users will immediately enjoy an improved user experience, including the premium Windows Aero user interface effects. The new interface provides translucent windows, dynamic reflections, and smooth animations. These effects will help customers focus on their content rather than the tools and interface, reducing software overhead.

“Windows Vista delivers efficiencies that make users more productive,” said Brad Goldberg, general manager for Windows Client Product Management Group at Microsoft Corp. “SolidWorks’ certification on Windows Vista means product designers and engineers will be able to work more efficiently, so they can focus more on creativity. This announcement is a testament to SolidWorks’ commitment to its users by continuing to aggressively support the Windows platform.”

In addition, Windows Vista presents SolidWorks customers with new capabilities for search, preview, navigation, and content syndication. For example, SolidWorks software is fully integrated with the powerful new Instant Search feature in Windows Vista and expands on it by incorporating deep knowledge of how 3D CAD users work. As a result, Instant Search will return the results that SolidWorks users seek, whether from the hard drive, the SolidWorks Toolbox, or repositories associated with PDMWorks® software and the 3D ContentCentral® service. This integration enables design teams to accomplish more work in less time.

Windows Vista’s productivity features will benefit SolidWorks customers such as Leatherman Tool Group. “We have an aggressive schedule to implement SolidWorks on Microsoft Windows Vista,” said CJ Goodrich, product design engineer at Leatherman Tool Group. “We are attracted by the Aero graphics, search, and security enhancements in Vista. Based on our initial tests, we will expand our SolidWorks installation as soon as SolidWorks Vista is released to production.”

In other enhancements, SolidWorks Edition for Windows Vista for the first time provides high-resolution images as previews in common dialogs and search results. The framework will give users much more information without requiring them to open the documents. SolidWorks Edition for Windows Vista will also take advantage of the RSS feed capabilities in Windows Vista, giving SolidWorks a new, efficient way to deliver tips, notices, and event information to customers.

“It’s critical that SolidWorks users be first to leverage new capabilities for designing better products, whether the capabilities be new CAD or analysis features, or a new operating system that unleashes additional power in existing features,” said Austin O’Malley, SolidWorks’ chief technology officer. “SolidWorks Edition for Windows Vista sustains SolidWorks’ record for being first, which is only important because it extends customers’ competitive advantage.”

An early version of SolidWorks 2007 on the Windows Vista Business Edition is available today by arrangement with SolidWorks. SolidWorks Edition for Windows Vista will be generally available to new and Subscription Service customers in the first quarter of 2007 by service pack download at http://www.solidworks.com/pages/services/downloads.html. To see SolidWorks Edition for Windows Vista in action, visit www.solidworks.com/pages/vista.html. To hear more about how users will benefit from SolidWorks Edition for Windows Vista, click on the podcast with SolidWorks Product Manager Mark Biasotti at www.solidworks.com/pages/news/MediaPcasts.html.